Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

793
FXUS63 KLOT 062330
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
630 PM CDT Mon Jul 6 2026

.KEY MESSAGES...

- Dry and more seasonable conditions expected through Wednesday
  before shower and thunderstorm chances return Thursday.

&&

.DISCUSSION...
Issued at 248 PM CDT Mon Jul 6 2026

Surface high pressure will dominate across our area Tuesday
into Wednesday. The net result will be dry weather with mostly
sunny weather through midweek. Temperatures will rebound back
into the mid 80s Tuesday (70s near the lake with onshore winds)
and into the mid to upper 80s on Wednesday. While dry weather is
anticipated both days, chances for showers and thunderstorms
return to the forecast later in the week.

Later in the week, a surface cold front is forecast to slide
southward from the Upper Midwest into the lower Great Lakes.
This front will likely act as the focus for showers and
thunderstorms to our northwest Wednesday into Wednesday night,
then potentially across our area Thursday into Thursday night.
We will have to keep an eye on the threat for more locally heavy
rainfall with this activity, especially given the potential for
slow storm motions. Some lingering chances for showers and
storms will persist on Friday, though the with the effect front
likely to be shunted southward, the better focus for
precipitation Friday may largely end up well south of I-80.

This weekend into early next week, ensemble guidance supports
the building of an expansive upper-level ridge across the Plains
into the Upper Midwest. Building heat under this ridge will
result in warming temperatures (back into the upper 80s) into
our region through the weekend.

KJB

&&

.AVIATION /00Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 630 PM CDT Mon Jul 6 2026

There are no hazardous aviation conditions expected through the
current TAF window, maintaining VFR conditions in the forecast.
Northeast winds will diminish through the evening and slowly
become just west of north around midnight. There is a non-zero
chance for BR early tomorrow morning away from the city of
Chicago. However, the air mass (both currently and modeled
through tonight) looks too dry near KRFD. While there is
slightly better low level moisture around and east of KGYY,
confidence was too low for formal mention in the TAF. Light
northwest winds will start the day tomorrow before a lake breeze
around 10 knots arrives midday flipping things back to the
northeast for Chicago terminals.

DK

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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